My spouse does not want to have joint bank account

Hi, My spouse was married once and strongly disagree to have joint bank account.

Would it be a problem for my immigration case ?

But we do have Lease of rent, PG&E, Rental insurance from USAA, Lots of photos with him including his parents

Also can I start file all forms before getting married in 2 weeks ? Ir shows the date on USCIS website. I just want to be done with documents ASAP

Thanks in advance !